{
  "schema": "brenner-unit-media-closure-v2",
  "unit": 21,
  "authority_only_boundary": true,
  "reader_media_positions": 0,
  "animated_html_positions": 0,
  "unique_local_assets": 0,
  "metadata_file": "authority/commons-imageinfo-unit-21.json",
  "metadata_bytes": 7983,
  "metadata_sha256": "62a31cd0b5759ac7ab18ae47203a1285d6bb3d4825fbe407140da2a4a3192be1",
  "rights_file": "authority/RIGHTS-unit-21.csv",
  "rights_bytes": 443,
  "rights_sha256": "6b8de6f5a63f32d9f22e7fb69c98ba2d787121a2437a392602571504c2a1c544",
  "reader_credits_file": null,
  "reader_credits_required": false,
  "accessibility": {
    "reader_media_alt_or_caption_required": false,
    "reason": "The parsed Unit 21 entry surfaces contain no substantive reader media.",
    "official_pdf_surfaces": [
      {
        "local_path": "authority/artifacts/lecture-21-official.pdf",
        "encrypted": false,
        "extractable_text_characters": 9324,
        "tagged_pdf": false
      },
      {
        "local_path": "authority/artifacts/worksheet-21-official.pdf",
        "encrypted": false,
        "extractable_text_characters": 7252,
        "tagged_pdf": false
      }
    ]
  },
  "official_pdf_witnesses_are_not_media_positions": true,
  "official_pdf_component_rights": [
    {
      "title": "File:Algebraische Kurven (Osnabrück 2025-2026)Vorlesung21.pdf",
      "pageid": 179647116,
      "revid": 1158235721,
      "timestamp": "2026-02-02T16:06:54Z",
      "mediawiki_sha1": "a329fe6868f8a5838d774025416780331d3b2838",
      "description_wikitext_bytes": 321,
      "description_wikitext_sha256": "a96b11a725bd817212af8ab4a121ad15d595ec51785fb1558b78af8a9836ba26",
      "description_url": "https://commons.wikimedia.org/wiki/File:Algebraische_Kurven_(Osnabr%C3%BCck_2025-2026)Vorlesung21.pdf",
      "artist": "User:Bocardodarapti",
      "credit": "Own work",
      "license_short": "CC BY-SA 4.0",
      "usage_terms": "Creative Commons Attribution-Share Alike 4.0",
      "license_url": "https://creativecommons.org/licenses/by-sa/4.0",
      "attribution_required": "true",
      "local_path": "authority/artifacts/lecture-21-official.pdf",
      "local_bytes": 189481,
      "local_sha256": "12c5dd813cd7d574aaeca33c02dbab1f8cbc4de131030c31dd9eba4007e14ebd",
      "source_bytes": 189481,
      "source_sha1": "0c7ad05a184c5d90d90345bdf1072dc517c0f3e8",
      "source_timestamp": "2026-02-02T16:06:54Z",
      "accessibility": {
        "encrypted": false,
        "extractable_text_characters": 9324,
        "tagged_pdf": false
      },
      "internal_pdf_boilerplate_label": "CC-by-sa 3.0",
      "governing_current_course_and_commons_license": "CC BY-SA 4.0",
      "license_discrepancy_note": "The generated PDF retains a CC-by-sa 3.0 boilerplate, while the frozen current course declaration and Commons description bind this official component as CC BY-SA 4.0."
    },
    {
      "title": "File:Algebraische Kurven (Osnabrück 2025-2026)Arbeitsblatt21.pdf",
      "pageid": 182948469,
      "revid": 1168719810,
      "timestamp": "2026-02-19T14:51:55Z",
      "mediawiki_sha1": "fc5a47bcff0f2eef0ee4418d8bddbbdbca906e84",
      "description_wikitext_bytes": 327,
      "description_wikitext_sha256": "b8a581b6bec8d965e9b907f5fbd7061433c722cc6f5b48c888c0a16428b12d0f",
      "description_url": "https://commons.wikimedia.org/wiki/File:Algebraische_Kurven_(Osnabr%C3%BCck_2025-2026)Arbeitsblatt21.pdf",
      "artist": "User:Bocardodarapti",
      "credit": "Own work",
      "license_short": "CC BY-SA 4.0",
      "usage_terms": "Creative Commons Attribution-Share Alike 4.0",
      "license_url": "https://creativecommons.org/licenses/by-sa/4.0",
      "attribution_required": "true",
      "local_path": "authority/artifacts/worksheet-21-official.pdf",
      "local_bytes": 155433,
      "local_sha256": "5457b23d9e4dfb6054fa0cdd1d7c823440307ed4d4710a9af244573b8bf89440",
      "source_bytes": 155433,
      "source_sha1": "4bbf49967a415c124702f29c6e5250d8a02bf8e3",
      "source_timestamp": "2026-02-02T13:38:36Z",
      "accessibility": {
        "encrypted": false,
        "extractable_text_characters": 7252,
        "tagged_pdf": false
      },
      "internal_pdf_boilerplate_label": "CC-by-sa 3.0",
      "governing_current_course_and_commons_license": "CC BY-SA 4.0",
      "license_discrepancy_note": "The generated PDF retains a CC-by-sa 3.0 boilerplate, while the frozen current course declaration and Commons description bind this official component as CC BY-SA 4.0."
    }
  ],
  "component_discrepancies": {
    "official_pdf_license_boilerplate": [
      {
        "local_path": "authority/artifacts/lecture-21-official.pdf",
        "embedded_label": "CC-by-sa 3.0",
        "current_commons_and_course_license": "CC BY-SA 4.0",
        "note": "The generated PDF retains a CC-by-sa 3.0 boilerplate, while the frozen current course declaration and Commons description bind this official component as CC BY-SA 4.0."
      },
      {
        "local_path": "authority/artifacts/worksheet-21-official.pdf",
        "embedded_label": "CC-by-sa 3.0",
        "current_commons_and_course_license": "CC BY-SA 4.0",
        "note": "The generated PDF retains a CC-by-sa 3.0 boilerplate, while the frozen current course declaration and Commons description bind this official component as CC BY-SA 4.0."
      }
    ],
    "lecture_pdf_temporal_scope": {
      "entry_revid": 1112312,
      "entry_timestamp": "2026-08-21T09:27:05Z",
      "official_pdf_timestamp": "2026-02-02T16:06:54Z",
      "note": "The current lecture revision postdates the official PDF binary. The PDF is retained as an official witness, not asserted to be a current-content clone."
    }
  },
  "assets": []
}
